* azure-sdk-for-go to 3.1.0-beta
* go-autorest to 7.0.7
* dgrijalva/jwt-go to 3.0.0
Add the German cloud configuration.
Ensure the different cloud URLs are _actually_ used.
This is last merge that will happen from the github.com/Azure/packer-Azure
repository. All development is being over to this repository.
The biggest change in this merge is support for Windows. There are a few other
fixes as well.
* If the user cancels the build, clean up any resources.
* Output a reasonable build artifact.
* Log requests and responses with Azure.
* Support for US Government and the China clouds.
* Support interrupting long running tasks.
* Allow the user to set the image version.
* Device login support.